“…The irradiated area on the donor layer is made with a combination of beams from masks 1 and 2, as it will further be shown. Both masks were produced by laser micromachining [23] of titanium foil (25 μm thickness, 99.6% purity, supplied by GoodFellow Inc.) in a vacuum chamber (7 · 10 -5 mbar), by using an achromatic lens (700-1100 nm spectral range, 50 mm focal length) and a femtosecond pulsed laser (Spectraphysics, model "Hurricane", 800 nm wavelength, 100 femtosecond pulse duration, 1 mJ/pulse @ 1 kHz repetition rate) [24][25][26][27][28][29][30]. The scan/drill speed was set at ~10 μm/s, with automatic computer control of the positioning system; the size of the resulting masks is 2 x 2 mm 2 .…”